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In the mid-26th century, Pitkin was an agricultural world within the Outworlds Alliance, located close to the Alliance border with the Federated Suns. In 2581, the Star League sent the Outworlds Alliance Task Force consisting of two SLDFcorps supported by an auxiliary force from the Draconis Combine to forcibly incorporate the Alliance into the Star League, following the mass rejection of the Pollux Proclamation by the Alliance along with the other major Periphery states. Although Pitkin wasn't targetted in the first wave of attacks, it was an early target during the second year of the invasion.[4]

GeneralAmos Forlough, commander of the Star League task force, issued the attack orders for both Pitkin and the nearby world of Kennard on the 6th of January 2582. The militia forces on Pitkin consisted of barely a single battalion of light armor and a single battalion of irregular infantry at this point in time, as Pitkin was located far from what the Outworlds Alliance Militia considered to be the likely invasion route into the Alliance, making Kennard a low priority for resources. Forlough dispatched the 17th Royal Brigade - one of the three brigades within the 6th Royal Division of II Corps and fresh from weeks of rebuilding after the 6th Royal Division had suffered significant losses against the Pitcairn Legion on Sevon in late 2581 - to annex Pitkin. The militia posed no real challenge to the 17th Royal Brigade and were eliminated in days.[4]

House Davion forces were allowed to effectively annex Pitkin in 2584 by the new commander of the Outworlds Alliance Task Force, Major GeneralFranklin Barnex, following SLDF redeployments which removed units from occupied worlds in the Outworlds Alliance to fight against the Taurian Concordat. On the 1st of August 2585 Pitkin was formally ceded to the Federated Suns along with 8 other worlds as a part of the terms laid out within the Treaty of Cerberus.[5]